Documents Archive

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The documents on this page describe the evolution of RSEI over the past ten years. The Reports listed below were released to document various aspects of the model. The Methodology documents describe the data and methods used to calculate RSEI results, and the User's Manuals describe how to use the model interface. All of the documents refer to the RSEI model as implemented at the time, and may not reflect the current version. Please see Documents for the most recent supporting documentation.

Note: EPA no longer updates this information, but it may be useful as a reference or resource.

Note that some documents refer to the "TRI Relative Risk-Based Environmental
Indicators," the original project name.

Toxics Release Inventory Relative
Risk-Based Environmental Indicators: Interim
Toxicity Weighting Summary Document, June 1997 (PDF)(252 pp, 3.5 MB)
This report, prepared for the June 1997 SAB review, discusses
the methods used to derive toxicity weights from published toxicity
values and from dose-response data found in the literature. In
response to comments received from the SAB, changes were made
to the toxicity weighting methodology used in the Indicators model.
Data from the Office of Pesticide Programs was approved for inclusion
and the algorithms used to assign toxicity weights have been modified
to proportionally reflect the toxicity values themselves. However,
the basic philosophy supporting the methodology has not changed.

Toxics Release Inventory Relative
Risk-Based Environmental Indicators Methodology,
June 1997 (PDF)(287 pp, 5.4 MB)
This report, prepared for the June 1997 SAB review, explains how
the proposed Indicators are constructed, and includes discussions
of the conceptual methodology, data sources, and the computational
approach.